Spacing table



May 19, 1925. 1,538,474

E. G. DANIELE SPACING TABLE Filed 001;. 31, 1923 6 SheetsLSheet l l v I i l I May 19, 1925.

1,538,474 E. G. DANIELS y sPAcING TABLE Filed Oct, 51; 192 6 Sheets- Sheet 2 -Filed om s1. 1925 s sheets-'Sgm s May 19, 1925.

E. 1. DANIELS sPAING TABLE' Filed oct. 31. 1923 6 Sheets-Sheet 4 G. DANIELs sPAcING TABLE e sneetsLsh'eet e Filed Oct. 31.\ 1923 Patented May 19, 1925.

uNirED Srarris PAT-ENT orifice.

nnwIn c. "canines, onv cnlcncfo, ILLINOIS, AssIeNoa- Tofonicaeonainsna ,IR-ONV COMPANY, onoIrIoAeo. ILLINOIS, a CORPORATION OF ILLINOIS.

sentirne TABLE.

\ ,Y Application filed October 31,1923. Serial No. 671,933.

To oZZ whom may` concer/a:

Be it known thatfl, EDWIN G. Banners,v

Improvement: in. Spacing rFables, of which` the following is a specification.

rlhis inventiony relatesto improvements in spacingetables- Or mechanism tor iteedii'ig-` sheet ymetalto punchingmachines and the like. 'By meansof: my improved spacingtable itis possible topunchlioles which are very accurately spaced.` AlthoughI have shown the sp acing-table designed forv lopeiation in connection witha piinchinginacliiiie,

it is. obvious that without detracting from,

the spirit of the invention, the spacing-table may be used in connection with any other kind of machine designed. to perl'orin suc cessiveoperations upona piece OE sheetmetal wherek it is necessary or desirable to reed;

mechanism so that practically any desired spacing interval may be Obtained, the exact distance between the holes being` visible on a gage with which the table is equipped. Other features and advantages of my improved spacing-table willappear more fully. as I proceed. with my. speciiication.

In that 'Orm of device en'ibodying the y features of: my invention shown. in the accompanying drawings, Figure 1 a top.-y plan View of my. improved spacingftable` showing `parts brokenaway, Fig.' 2 is a similar view in side elevation, Fig. 3 is,` a transverse vertical sectional view taken as. indicatedr by the line 3 of. Fig. 1, Fig. Ll, is a top plan view of the device with the table itself removed showing the spacing inechanisinunderneath, Fig. 5 is a view taken as indicated lby the line 5 of Fig. Zl, Fig. 6 -is a longi.- tiidinal sectional view taken as indicatedby the line 6 otFig. 4, Fig; 7 is avertical longitudinal sectionalview showing the yoperation of. one of the dogs forming`- a partV of the f spacing mechanism, the view being takenas It is also possible witlimy im indicated by the line of Fig. S, Fig. 8 is a view taken as indicated bythe line 8 of F ig. 7, Fig. 9 is a view taken as indicated by the line 9 of Fig. l and Fig. 10 is a view taken as indicatedv bythe line 100i Fig. 9,.

As shown in the drawings,.A indicatesfin general a punch press in 'connection with which my improvedspacing-table may oper-y ate. 12 indicates the punch head of the punch press carrying the punches 13 of which there may be any desired number. It is'obvious that any number of punches may be used at once. 14. indicates a rotata-ble shaft designed for reciprocating the punch head. These elements form parts of an ordinary punch press and are no part of the present invention. Any, kind ot punch press may be nsedin connection'with my iinproved spacing-table.

My table includes-,a long, rectangular, fiat table proper 2O suit-ably stiiiened and supported by longitudinally arranged' parallel angle-irons 21 attached to its underE surface. Thek outer pair-of angle-irons 21 havetheir depending flanges resting on the rollers `22 in` order to make tlietable easily movable. It is to'be noted that the rollers 22 on` one side of the table are groovedto accommodate the flangeof the angle-iron l21 and keep the table in. alignment. Any desired means may be utilized for moving the table. For example, it may be moved manually.l I` have here shown suitably supported at oneside of the table a rack-ban 23 with a large gear-wheel 24 engaging with the teeth thereon. Any suitable meansv (not shown) may be provided for driving the gear-wheel 24 in order to impart movement to thev table.,

Longitudinally extendingy and centrally arranged on the under side of the table, here shown as supported by two of themembers 21, are six rack-bars indicated as 24221", 24F', 24rd, 24e, and 24f. Each oi these rackbars rhas downwardly projecting teeth regu-v larly spacedv throughout its length; butthc space between twoV adjacent teeth 'onx eachf rack-bar is dii'erent. For example, the teeth on ther-ack-bar 2li-LL may be spaced one inch apart, those on the bar 24, 11/2 inches apart, those on the next bar, 2 inches apart and those on the next bars, 21/2 inches, 3

inches and 3%inches apart. It is obvious.y

that the spacing of 'these teethv on one or.

more of the racks-bars may be asv desiredtor nism is to be put. rlhese bars are preferably made detachable so that they may be quickly and easily removed and replaced by other bars with differently spaced teeth, if desired.

Arranged below the racl-z-bars 2st to 2Q are six dogs 25a to 2,5f inclusive, each adaptw ed to cooperate with its corresponding rachbar when in operative position. The following means are provided for placing any one of the dogs 25"L to in operative position. l will describe in detail but one of the dogs and its associated parts, it being understood that there are six dogs in all, each operated in a similar manner. l will describe the dog shown in Fig. i' which is indicated by 25 and in connection with this dog where l use reference numerals followed by the letter a, it is to be understood that in each case, there are six similar parts, a7 to f inclusive, one for each of the corresponding dogs. Transversely arranged and rotatably supported at one side of the dogs 25 to 25f is a bar 26 having six flattened portions thereon as indicated by 27 to 2'4" inclusive, one for each of the corresponding rack-bars. rlhese flattened parts are spaced around the circumference of the bar 2G, (SO degrees apart so that as the bar is rotated. one at a time is at the under side. Arranged below the bar 2G are six pivoted levers 28 to 28f inclusive, one for each of the dogs 25a to 25f. rlhe lever 28a is pivoted at 29 as shown and has one end bifurcated with the dog 25a lying between the prongs. The ends of the prongs are rounded as indicated by 30 and lie in recesses 31 formed in the sides of the dog 25a. The dog 25a has a projection 32 near its lower end to weich it attached a spiral spring` 33 which tends to pull it upwardly. The bar 26 lies just above the pivoted lever 2S (see Fig. 7) and is so arranged that when the flattened place 2T is on the under side, the bifureated end 30nu of the lever .is permitted to rise su'Hiciently so that the dog 25 at its upper end will engage the teeth of the corresponding rack-bar 24a. When the bar 2G is rotatet, however, so that this flattened portion is not on the bottom side, the bifurcatc-d end of the lever 2SFL will be depressed sulliciently to lower the dog 25CL so that it will be in inoperative position so that its upper end will not engage the teeth of the rack-bar 2LP. lt will be seen that with this construction by rotating thebar 2G so that any desired flattened part 2T to 2li will be on the under side, any desired dog 25 to 25f is permitted to rise sufficiently to engage the teeth of thel corresponding rack-bar, the other live dogs all being held down in inoperative position. rlhe following means are provided for rotating the bar 2G in order to put any dog desired into operativeV position. The bai 26 (see Fig. is extended out to the side of the table and has on its end a bevel gear 35 meshing with another bevel gear 3G on the end of the longitudinally arranged shaft 3T. The shaft 37 has its other end made hexagonal in shape as indicated by 3S to SS inclusive corresponding` to the six faces of the hexagonal part. The following means (see Fig. 5) are provided for rotating the shaft 37. Mounted on this shaft is a gear wheel 40 meshing with an arcuate ack ilil controlled by lever 42. A scale lf3 is provided and the parts are so arranged that movement of the rack t1 will rotate the shaft 37 one complete turn so that it may be moved to bring any one of the faces 3S to 538i upwardly. The corresponding dog thus put into position is indicated by the scale d3. It will be seen therefore that it, for example, the shaft 37 is so turned that the dog 25 will be in operative position to engage with the rack-bar 2l having its teeth spaced one inch apart that the table may be moved one inch at a time by allowing the dog 26n to engage with the successive teeth on the rackbar 24. rlhe table is moved from right to left as viewed in Figs. l and 6. lf spacing 1% inches apart is desired, the shaft 37 is turned with the face 38 upwardly so that the dog 25b will be put into operative position to engage with the rack-bar 24h having its teeth spaced 11/2 inches apart. The mechanism also has a line or vernier adjustment for obtaining spacings between those given by the rack-bars alone. In speaking, therefore, of obtaining a. spacing of one inch by use of the rack-bar 24u, I assume that this vernier adjustment, which l will describe in detail later, is set at neutral. Likewise, in getting a spacing of 11/2 inches by the use of the rack-bar 2lb which has its teeth spaced 1% inches apart, I assume that the vernier adjustment is set at neutral.

lt is obvious that in the operation of the device some means must be provided for disengaging the dog which is in use at the time from the teeth on the corresponding raclebar in order to permit successive movenient-s of the table for successive operations of the punching-machine. l will now describe this means in connection with the dog 25, it being understood that there are simiar means for each of the other dogs. Arranged below the levers 28L to 2Sf is a rotatable shaft 50 provided with six arms 5ln to lf corresponding to the six levers 28n to 2Sf. rlhe shaft 50 extends transversely under the table and is provided at one end with an arm 52. Upward movement of the arm 52 will rock the shaft 50 to raise all the arms 5l to lf inclusive. Five of the dogs are being held down by the shaft 26 and consequently their corresponding levers 2S will not be engaged by the arms 5l. Assuming that the dog 25 is the one in operative position, it will be seen that the end of lltl llf)

` the leverf281'willi he engaged bythe arm 5I- CIK to lower the 'dog 25fwhen the lshaft 50 is rocked. This rocking of'i the'sh-aft 50 -may be; accomplished un any desired manner.

f For example, after each punching opera@ tioingthearm 52 may be manually' raised to lower the dog out of the notch i-n theyracl'- bar 24a. Preferahly,`means such as thever-V tical shaft 55 are provided, adapted to beI operated by the maclfiinery running the punch press to raisethesh-aft 55 after each punching operation and release the dog 25a'v from the tooth in the rack-bar. Itis tov be noted thatv the dog 25 (and the other dogs Y likewise) is somewhat loosely mounted in the vertical slot in which it moves so that it can roch slightly. A stop 56 is provided against which the dog hears when engaged hy they tooth T in the rack bar 24a: The

movement' of the table is thereby limited.

Then the dog is disengaged from the tooth 57a, however, and is then again pulled up wardly by the spring 33a', the armv 32?L ope erates to rock the dog slightly totherifght (as viewed in Fig. 7) so that the dog, asl it again rises, will-l not goup in front of the tooth 57 as shown by the solid l-ines in- Fig. `but will be caught by the top of the tooth' and arrested in the position shown by the broken lines in this jfigure. When in this position, obviously the tooth will not be engaged by the dog so that the table ina-y be moved to the left and as; itis so moved the dog will slipinto` the next notch because of the pull of the` spring and will engage the next tooth 5S" on the raclibar. The operation of the parts thus far described should now be clear. I will assume that; the rackbar 24a, havingl its teeth set one inch apar-t, is being used and that the Vernier adjustment is at neutral. The tabler is then moved tothe left in any desired manner whereupon the dog L willengage the tooth 57 of the rack bar 24a. A punching operation is then performed. The arin 52 is then raised in any; desired manne-r to rock the shafty to raise the arm 51a to rock the lever 28a tolower the dog 252L soy that it will become disengaged from the tooth 572 lThe arm 52 is then released, whereupon the spring 33a will again raise the dog 25a', but rock it slightly to the right (see Fig. 7) so .that as it rises it will engage the top ofthe tooth 57a. The table is then pushed to the left whereupon the dog 25;l will ride into vthenextnotch and"r be engaged by the next: succeeding tooth 5,8rb

thus giving a spacing of one inch where-u-p- A between the intervals of twok raclr-bars.

The dogs25f"L to. 25" are mounted; in` a block formed of seven plates 6() arranged on edge andy suitably spaced apart and bolted` to gether. This entire block carrying the dogs isr substantially cubicalA in shape and adapt-1 ed to.y slide longitudiinilly in. the guides 61. Three of the plates 60- have forwardly pro.- jecting extensionsv62' which are joined together at their forwardfends by a plate 63,. the forward end of. which is pivotally a-ttached to: the transverse lever- 64eY by means. of the pin` 65. 66 indicates a substantially circular platel flattened at two` sides.. asV indicated by 6. 'Ihis plate is slidably supeV ported` by means of the hangers 68 on the guide rods 69. The lever 6&1 is attached to theplrate 66 at one end byme-ans of the linlr Z0 'and' at the other end hy means of the threaded'rod 7l'. This: threaded rod is provided in order to. give method of adjust ingv theposit-ion of the attachment. of the ends of the extensions 62 tothe plate 66. In normal operation the screw-threaded rod 71 is set accurately and allowed vto remain so. It will be seen then that the entensionsV 62 are attached tothe plate 66 and that this plate 6.6 is: slidlahle on the guides 69. rlhe extension-s 62, as hasbeen stated hefore, carry the block formed of' the plate 60 in which the dogs 25.a to 25.f arelmoi-inted. As lrasbeenl stated, this block is also slid-able longtudinally. It will: be seen therefore that ift the plate 6,6 is stationary, the spacingon the work will correspond exactly to the spacing ofI theteeth-on the rack-har being used. If, however, the plate 661 slides forwardly at each punching,v operation, the spacing given will be the spacing of the teeth on the raelnbar plus: the distance that the plate 66 slides forward at each operation.

Tl'iiswill follow because if the plateinoves forward it will also carry the block inwhich the dogs are mounted and thus give a` longer space than the interval between the teeth on the raelsbar. For example, assuming again that the rack-bar 24;a is being used and that the teeth o n this bar are spaced one inch apart,it will be seen that if' the plate 66 is stationary, the punching operations will he one inch apart. If, however, after each punching operation, theA plate 66 moves forward (that is, in the direction of the movement of the table) (5 4 of an inch, the dog 25a, at each punching operation, will nieve forward 6l-4 of an inch with the result that the cistancebetween the holes punched will be 15% inches.

The following means are provided for so moving the plate 66 forward any desired distance at each punching operation; or for setting the Vernieradjustment at neutral so that the punching operations will correspond exactly to the spacing oit the teeth on the rack-bar, the plate 66 not moving at all. Centrally arranged in the plate 66 is a pivot pin 7 9 carrying on its lower end below the plate 66 a generally transversely arranged guide 7l. Slidably mounted within the guide 7l is a block 72 pivotally mounted by means ot a pivot pin 73 to another block or shoe 7i adapt-ed to slide on the transversely arranged rails 75. Between the rails 7o is a screw 76 extending through the block 74. The rails 7 5 are rigidly mounted on the base plate 77. It is obvious that when the guide 7l is parallel to the rails 75, rotation ot the screw 76 will move both of the blocks 72 and 74; transversely of the device without causing any relative movement between the plate 66 and the base 77. It, however, the guide 7l is turned, as shown in Fig. 10, so that it is not parallel with the rails 7 5, rotation of the screw 76 will move the blocks 7 2 and 7 t transversely along the length of the screw 7 6. Since the rails 75 are rigidly mounted, this movement of the blocks will be exactly transversely of the device. It the guide 7l is slightly twisted so that it does not lie exactly transversely of the device, mov-ement ot the blocks 72 in this guide will cause a corresponding movement of the plate 66 longitudinally of the device. For example, if the guide 7l is in the position as shown in Fig. l0, nio-vement oit the blocks 72 trom lett to right caused by rotation of the screw 76 will move the guide 7l and consequently the plate 66 ttorwardly. Rotation of the screw 76 is obtained in the following manner. This screw has mounted on its end (see Fig. 9) a pinion 8O meshing with an intermediate pinion 8l which in turn is adapted to be driven by a pinion 82 on a shaft 8f3 which has another pinion 84- on its other end adapted to mesh with the rack-bar on the table 20. It will be seen, therefore, that movement ot the table 23 will cause consequent rotation ot the screw 76. As has been stated, it the. guide 7l is arranged exactly transversely of the table and parallel with the screw 76, such rotation of the screw will cause no movement of the plate 66. It, however, it is twisted or turned, for example, to the position shown in Fig. 10, such rotation ot the screw 76 caused by each forward movement of the table will cause a corresponding forward movement of the plate 66 and dog 25 corresponding to th-e position ot' the guide 7l. The rear end ot the guide 71 has attached to it a plate bent upwardly and hooked over the circular edge of the plate 66. The forward end of the guide 71 has attached to it a clamp 91 provided with a screw 92 adapted to be screwed down against the upper surface of the plate 66 in order to hold the guide 7l in the desired position. Attached to the clamp 91 is a U-shaped inember 93 lying under the hexagonal end oi. the bar 87. This U-shaped member 93 carries a wire 94 lying over the hexagonal tace 38a. Each of the faces 88 to SSf has suitable markings with which the wir-e 94 may be made to register. These markings are so spaced as to show the exact spacing which the machine will give. It is to be noted that with this adjustment a very line and accurate spacing may be obtained. For example, the wire 94- inay travel over markings on the tace 88a covering a distance ot more than two feet. Assume that the fac-e 3S indicates, as has been stated before, that a rack-bar with a spacing ot' one inch is being used. It the wire 9st is in the center oit the face 38, or in neutral, so that rotation of the screw 76 will cause no movement of the plate 66, itis obvious that the spacing will be one inch. The parts may be so made that if the wire 94 is moved a distance ot one foot on the face 38a, the spacing will be increased to 'l1/2 inches. It is obvious then that at intermediate points throughout this one foot movement ot' the wire 9i, the spaeing will vary from one inch to one and one half inches. In other words, an adjustment oit the wire 94 through a distance of one toot will make a variation in the spacing ot only one-half-inch. It will be seen therefore that a very fine and accurate adjustment of the spacing may be obtained.

It is to be noted that swinging or" the guide 7l in the other direction beyond the neutral point will cause a slight backing up of the dog 25u at each movement ot the table so that the interval between the punching operations will be correspondingly shorter than the interval between the teeth ot the rack-bar.

lVhile I have shown and described certain embodiments oi my invention, it is to be understood 'that it is capable otinanymodilications. Changes, therefore, in the construction and arrangement may be made without departing 'from the spirit and scope oi the invention as disclosed in the appended claims in which it is my intention to claim novelty inherent in my invention as broadly as possible in view oit the prior art.

lVhat I claim as new, and desire `to secure by Letters Patent, is:

l. A device oit the character described comprising; a slidably mounted table; a rack-bar attached to the table; a dog arranged in connection with the rack-bar, whereby the dog will engage the successive teeth or' the rack-bar upon successive movements of the table; and means for moving` the dog in a direction parallel to the movement ot' the table, a predetermined distance at each movement of the table.

2. A device ot the character described comprising; a slidably mounted table; a plurality oi rack bars attached to the table,

` 3. A device of the character described comprising; a slidably mounted table; a plurality vot rack-bars attached to the Vvtable; a plurality of dogs, one corresponding to each of the rack-bars; and means for moving any .one dog into operative position to engage 'successive teeth of 'the corresponding rackbar upon successive movements of the table, said means including a lever having one end connected tothe dog and a rotatable rod arranged adjacent said' lever and provided with a flattened surface, said flattened surface permitting movement of said lever to allow the' dog to mover-into operative position. v y

4. A device of the character described comprising; a slidably mounted table; a plurality ot rack-bars attached to the table; a plurality ofdogs, one corresponding to each rack-bar; a slidably mounted block carrying said dogs; and means whereby any onel of said dogs may be moved into operative positionto engage successive teeth ot thecorresponding rack-bar upon successive movements of themtable.V f e- 5.- A device ofthe character described comprising; a slidably `mounted table; a pluralityv or' Arack-bars attached to they table; a plurality of dogs, one corresponding to each rack-bar; a slidably mounted bloclccarrying rsaid dogs; a rotatable shaft mounted in said block; a pluralityof pivoted leversV mounted in saidblock, oneffor eachdog,v each having one end attached to its corresponding dog; and a plurality of flattened places on said rotatable rod, one'co'rresponding to each of lsaid pivoted levers whereby when said flattened place is adjacent a pivoted lever said corresponding pivoted lever is permitted to swing to allow the corresptmdingv dog to moveinto operativeposition; Y

comprising; a slidably mounted table; a rack-bar attached to the table.; a block arranged adjacentthe rack-harand adapted A rack-bar attached to the table;v a: slidable movement therein to engage yand disengage the teeth on the rack-bar; spring means car,- ri-ed by the block tending to pull the dog into engagement with the teeth of the rackbar; and means for holding said dog in inoperative posi-tion where it will not engagev the teeth of the rack-bar.

8. A device of the charactery described comprising; a slidably mounted .table; a rack-bar attached tothe table a block slidably mounted adjacent 'the rack-bar; a dog carried by said block and adapted tor move- .mentv therein to engage or disengage the teeth of the rack-bar; spring means tending to move the dog into position to engage the teeth of the rack-bar; ka. pivotcd lever carried by said block having one end attached to the dog; and a barv rotatably mountedl in said block and adapted to` engage said lever to-move the same to hold the dog away fromthe rack-bar; to cause it to disengage the teeth thereof7 said bar having a flattened part adapted to accomodate said pivoted lever to permit the dog -to move toward the rack-bar to engage the teeth thereof. v

9. A device of jthe character described comprising; a slidably mounted table; a

vrack-bar attached to the table; a dog arranged in connection with the rack-bar,

whereby the dog will engage successive teeth of the tablegiand` means loperatedv by the table for moving the dog in a direction parallel to the movement of the table, a predetermined .distance at each movement or the table. y y y t 10. A device of the character described comprising; a slidably mounted table; a rack-bar attached to the table; a dog arranged in connection with the rack-bar, whereby the dog will engage successive teeth or the rack-bar upon successive movements of the'table; means for movingthe dog in a direction parallel to the movement of the table a predetermined distance lat each movement of the table, said means including two blocks connected together,v one mounted lon a. screw arranged transversely of vthe table, and thek other slidably mounted in a guide connected to the dog; and means for l t f e varying the angularity between said trans- 6'. A device ot `the character ldescribed*` versely arranged screwand said guide.

11. A device of the character described comprising;` a slidably mounted table; a rack-bar attached to the table 4a ldog a1'- ranged in connection with the rack-bar, whereby the dog will engage successive teeth of `the rack-bar upon successive movements ofJv the table; means for moving` the dog in a direction parallel to the movement of the table a predetermined distance at, each movement of the table, said means including twfo blocks connected together, one ymounted en a screw arranged transversely of `of the yrack-bar upon successive movements the table, means 'for rotating said screw, and the other block slidably mounted in a guide connected to the dog; and means for varying the angularity between said transversely arranged screw and said guide.

12. A device of the character described comprising; a slidably mounted table; a rack-bar attached to the. table; a dog arranged in connection with the rack-bar, whereby the dog will engage successive teeth of the rack-bar upon successive movements of the table; means for moving the dog in a direction parallel to the movement ot the table a predetermined distance at each movement of the table, said means including two blocks connected together. one mounted on a screw arranged transversely of the table, means operated by the table for rotating said screw, and the other block slidably mounted in a guide connected to the dog; and means for varying the angularity between said transversely arranged screw and said guide.

13. A device of the character described comprising; a slidably mounted table; a rack-bar attached to the table; a slidably mounted block arranged adjacent the rackbar; a dog carried by said block and adapted to engage successive teeth ot the rackbar upon successive movements of the table; and means for moving the dog in a direction parallel to the movement of the table a predetermined distance at each movement of the table, said means including a pair of blocks connected together, one of said blocks mounted on a transversely arranged screw, the other block slidably mounted in a guide connected to the block carrying the dog, and means for varying the angularity between said guide and said transversely arranged screw.

14. A device oit the character described comprising; a slidably mounted table; a rack-bar attached to the table; a slidably mounted block arranged adjacent the rackbar; a dog carried by said block and adapted to engage successive teeth of the rack-bar upon successive movements oit the table; and means for moving the dog in a direction parallel to the movement ot the table a predetermined distance at each movement ot the table, said means including a pair el blocks connected together, one ol said blocks mounted on a. transversely arranged screw, means for rotating said screw, the' other block slidably mounted in a guide connected to the block carrying the dog, and means for varying the angularity between said guide and said transversely arranged screw.

15. A device of the character described comprising; a. slidably mounted table, a rack-bar attached to the table; a slidably mounted block arranged adjacent the rackbar; a dog carried by said block and adapted to engage successive teeth of the rack-bar upon successive increments of' the table; and means for moving the dog in a direction parallel to the movement oitl the table, a predetermined distance at each movement of the table, said means including a pair of blocks connected together, one of said blocks mounted on a transversely arranged screw, means operated by the table Jfor rotating said screw, the other block slidably mounted in a guide connected to the block carrying the dog. and means 'for varying the angularity between said guide and said transversely arranged screw.

16. A device of the character described comprising; a slidably mounted table; a plurality of rack-bars attached to the table; a slidably mounted block arranged adjacent the rack-bars; a plurality of dogs carried by said block, one corresponding to each raclcbar; means for moving any one of said dogs into operative position to engage successive teeth ot the corresponding rack-bar upon successive movements ot the table; and means for moving the operative dog in a direction parallel to the movement of the table a predetermined distance at each movement of the table, said means including a pa-ir or blocks connected together, one ot said blocks mounted on a transversely arranged screw, the other block slidably mounted in a guide connected to the block carrying the dog, and means for varying the angularity between said guide and said transversely arranged screw.

17. A device oit the character described comprising; a slidably mounted table; a plurality ot rack-bars attached to the table; a slidably mounted block arranged adjacent the rack-bars; a. plurality of dogs carried by said block, one corresponding to each rack` bar; means for moving any one of said dogs into operative position to engage successive teeth of the corresponding rack-bar upon successive movements oit the table; and means for moving the operative dog in a di rection parallel to the movement of the table, a predetermined distance at each movement of the table, said means including a pair of blocks connected together, one of said blocks mounted on a transversely arranged screw, means for rotating said screw. the other block slidably mounted in a. guide connected to the block carrying the dog, and means ier varying the angular-ity between said guide and said transversely arranged screw.

18. A device oi' the character described comprising; a slidably mounted table; a plurality of rack-bars attached to the table; a slid bly mounted block arranged adjacent the rack-bars; a plurality of dogs carried by said block, one corresponding to each rackbar; means :tor moving any one of said dogs into operative position to engage successive teeth of the corresponding rack-bar upon successive movements of the table; and means for moving the operative dog in a direction parallel tothe movement of the table, a predetermined distance at each movement of the'table, said means including a pair of blocks connected together, one of said blocks mounted on a transversely arranged screw, means operated by the table for. rotating said screw, the other block slidably mounted in a guide connected to the block carrying the dog, and means for varying the angularity between said guide and said transversely arranged screw.

19. A device of the character described comprising; a slidably mounted table; a rack-bar attached to the table; a dog support arranged adjacent the rack-barg a dog mounted in said dog support and adapted for movement therein to disengage or engage the teeth of the rack-bar; spring means tending to move said dog in sa-id dog` support toward the rack-bar to engage the teeth thereof; said dog support alsol permitting slight movement of the dog therein in a direction parallel to the Amovement of the table.

20. A device of `the character described comprising; a slidably7 mounted table; a rack-bar attached to the table; a dog support arranged adjacent the rack-bar; a dog carried by said dog support and adapted yfor movement therein to engage or disengage the teeth of therack-bar and also adapted for slight movement therein in a direction parallel to the kmovement of the table; and

spring means tending to pull the dog toward the teeth of the rack-bar and also adapted for slight movement therein in a direction parallel to the movementof the table; and spring means tending to pull said dog in vsaid dog support in a direction opposite to the forward movement of the table.

V22. A device of the character described comprising; a slidablv mountedl table; a rack-bar attached to the table; a dog support arranged adjacent the rack-bar; a dogI mounted in said dog support and adapted for movement to engage or disengage the teeth of the rack-bar andA also adapted for movement in said dog support in a direction parallel to the movement of the table; spring means tending to pull said dog toward the rack-bar to engage the teeth thereof; and means tending to pull said dog in said dog support in a direction opposite to the forward movement of said table.

In witness whereof, I have hereunto set my hand and seal this 15th day of October, 1923.

EDWIN G. DANIELS. [n s.l 

